A student records the thickness of a cell membrane as 8000 pm8000\,\mathrm{pm}8000pm.
Another student converts this to 8 μm8\,\mu\mathrm{m}8μm.
Which statement describes the second student’s value?
It is 1000 times too small; the correct value is 8000 micrometres.
It is 100 times too large; the correct value is 0.08 micrometres.
It is 100 times too small; the correct value is 800 micrometres.
It is 1000 times too large; the correct value is 0.008 micrometres.
48 exam-style questions on Edexcel GCSE Biology 1.2 Number, size and scale, covering 1.2.1 Number, size and scale with estimations and 1.2.2 Quantitative units in relation to cells. Each one has a worked solution and a mark scheme showing where the marks go.